Can't send and receive emails via iRedMail on Ubuntu 12.04

Posted March 23, 2014 3.4k views
Hello! I'm already installed iRedMail - But after that I can't send or receive emails in Roundcube webmail. It said to me: SMTP error (-1). Please, help me.

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Can you post the whole error? Have you recently installed a firewall on your droplet?